// Copyright 2022 CloudWeGo Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package tracing

import (
	"context"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/common/tracer"
	"github.com/google/uuid"
)

var _ tracer.Tracer = (*ServerTracer)(nil)

type ServerTracer struct {
}

func NewServerTracer() *ServerTracer {
	return &ServerTracer{}
}

func (s *ServerTracer) Start(ctx context.Context, _ *app.RequestContext) context.Context {
	if v := ctx.Value("trace_id"); v == nil {
		ctx = context.WithValue(ctx, "trace_id", uuid.New().String())
	}
	return ctx
}

func (s *ServerTracer) Finish(ctx context.Context, c *app.RequestContext) {

}
